Add nginx conf template

Want the server to respond to all the http traffic.

From: http://dokku.viewdocs.io/dokku/configuration/nginx/
Signed-off-by: Alexander Alemayhu <alexander@alemayhu.com>

Dockerfile

@@ -56,6 +56,7 @@ RUN make -C $NETFILTER_DIR/iptables install
 USER $WEB_USER
 # Copy required source
 ADD CHECKS /app/CHECKS
+COPY nginx.conf.sigil $APP_DIR/nginx.conf.sigil
 COPY package.json $APP_DIR/package.json
 COPY index.js $APP_DIR/index.js
 COPY public $APP_DIR/public

nginx.conf.sigil

@@ -0,0 +1,36 @@
+server {
+  listen      80;
+  listen      3000;
+  server_name {{ .NOSSL_SERVER_NAME }};
+  access_log  /var/log/nginx/{{ .APP }}-access.log;
+  error_log   /var/log/nginx/{{ .APP }}-error.log;
+
+  # set a custom header for requests
+  add_header X-Served-By www-ec2-01;
+
+  gzip on;
+  gzip_min_length  1100;
+  gzip_buffers  4 32k;
+  gzip_types    text/css text/javascript text/xml text/plain text/x-component application/javascript application/x-javascript application/json application/xml  application/rss+xml font/truetype application/x-font-ttf font/opentype application/vnd.ms-fontobject image/svg+xml;
+  gzip_vary on;
+  gzip_comp_level  6;
+
+  location    / {
+    proxy_pass  http://{{ .APP }};
+    proxy_http_version 1.1;
+    proxy_set_header Upgrade $http_upgrade;
+    proxy_set_header Connection "upgrade";
+    proxy_set_header Host $http_host;
+    proxy_set_header X-Forwarded-Proto $scheme;
+    proxy_set_header X-Forwarded-For $remote_addr;
+    proxy_set_header X-Forwarded-Port $server_port;
+    proxy_set_header X-Request-Start $msec;
+  }
+  include {{ .DOKKU_ROOT }}/{{ .APP }}/nginx.conf.d/*.conf;
+}
+
+upstream {{ .APP }} {
+{{ range .DOKKU_APP_LISTENERS | split " " }}
+  server {{ . }};
+{{ end }}
+}